Someone said Nero Vision Express would do it. I don't know personally. Try a search for that proggy and see what the specs say.
TMPGEnc dvd author will do that for you. If you use a motion menu, you can use clips from the movie your authoring, with sound, and video.
That is the program I am using I am using motion menus but there is no sound, I must be doing something wrong. Thanks for quick reply
Bring up dvd author/click on create menu/menu display settings/motion menu tab/tick the box that says, use audio of the background video as the menu BGM.You can also set the length of time you want it to run as a loop.
hmmmm good question.I dont believe you can just import audio from another source(Ive never tried it so I could be wrong) Maybe try dvdlab, alot of folks on here swear thats the best.
I believe Nero Vision Express allows you as mentioned before, but its been a while since I tested it.